Quote:
Originally Posted by pwd72s
Considering how much horsepower can be found in cars being made today, why are these numbers a big deal?
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Because, as Jeff sez, 10:1 CR.
Modern motors are running much higher compression ratios for higher thermal efficiencies. In-cylinder injection is another big part of high numbers (controlling the burn/chem kinetics in a higher CR engine.)
And then there's the thermal physics of air-cooled motors. -steady state power is dependent on how fast you can remove excess heat.